/* Support routines for building symbol tables in GDB's internal format.
- Copyright (C) 1986-2013 Free Software Foundation, Inc.
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "symfile.h"
#include "objfiles.h"
#include "gdbtypes.h"
-#include "gdb_assert.h"
#include "complaints.h"
-#include "gdb_string.h"
#include "expression.h" /* For "enum exp_opcode" used by... */
#include "bcache.h"
#include "filenames.h" /* For DOSish file names. */
static struct subfile *subfiles;
+/* The "main" subfile.
+ In C this is the ".c" file (and similarly for other languages).
+ This becomes the "primary" symtab of the compilation unit. */
+
+static struct subfile *main_subfile;
+
/* List of free `struct pending' structures for reuse. */
static struct pending *free_pendings;
associated symtab. */
static struct pending_block *pending_blocks;
-\f
+
+struct subfile_stack
+ {
+ struct subfile_stack *next;
+ char *name;
+ };
+
+static struct subfile_stack *subfile_stack;
+
+/* The macro table for the compilation unit whose symbols we're
+ currently reading. All the symtabs for the CU will point to this. */
+static struct macro_table *pending_macros;
+
static int compare_line_numbers (const void *ln1p, const void *ln2p);
static void record_pending_block (struct objfile *objfile,
struct block *block,
struct pending_block *opblock);
-\f
/* Initial sizes of data structures. These are realloc'd larger if
needed, and realloc'd down to the size actually used, when
}
}
+/* Delete the subfiles list. */
+
+static void
+free_subfiles_list (void)
+{
+ struct subfile *subfile, *nextsub;
+
+ for (subfile = subfiles; subfile != NULL; subfile = nextsub)
+ {
+ nextsub = subfile->next;
+ xfree (subfile->name);
+ xfree (subfile->dirname);
+ xfree (subfile->line_vector);
+ xfree (subfile);
+ }
+ subfiles = NULL;
+ current_subfile = NULL;
+ main_subfile = NULL;
+}
+
/* For stabs readers, the first N_SO symbol is assumed to be the
source file name, and the subfile struct is initialized using that
assumption. If another N_SO symbol is later seen, immediately
{
subfile->dirname = subfile->name;
subfile->name = xstrdup (name);
- last_source_file = name;
+ set_last_source_file (name);
/* Default the source language to whatever can be deduced from
the filename. If nothing can be deduced (such as for a C/C++
return ln1->line - ln2->line;
}
\f
+/* Return the macro table.
+ Initialize it if this is the first use. */
+
+struct macro_table *
+get_macro_table (struct objfile *objfile, const char *comp_dir)
+{
+ if (! pending_macros)
+ pending_macros = new_macro_table (&objfile->per_bfd->storage_obstack,
+ objfile->per_bfd->macro_cache,
+ comp_dir);
+ return pending_macros;
+}
+\f
/* Start a new symtab for a new source file. Called, for example,
when a stabs symbol of type N_SO is seen, or when a DWARF
TAG_compile_unit DIE is seen. It indicates the start of data for
lowest address of objects in the file (or 0 if not known). */
void
-start_symtab (char *name, char *dirname, CORE_ADDR start_addr)
+start_symtab (const char *name, const char *dirname, CORE_ADDR start_addr)
{
restart_symtab (start_addr);
- last_source_file = name;
+ set_last_source_file (name);
start_subfile (name, dirname);
+ /* Save this so that we don't have to go looking for it at the end
+ of the subfiles list. */
+ main_subfile = current_subfile;
}
/* Restart compilation for a symtab.
void
restart_symtab (CORE_ADDR start_addr)
{
- last_source_file = NULL;
+ set_last_source_file (NULL);
last_source_start_addr = start_addr;
file_symbols = NULL;
global_symbols = NULL;
/* We shouldn't have any address map at this point. */
gdb_assert (! pending_addrmap);
- /* Initialize the list of sub source files with one entry for this
- file (the top-level source file). */
- subfiles = NULL;
- current_subfile = NULL;
+ /* Reset the sub source files list. The list should already be empty,
+ but free it anyway in case some code didn't finish cleaning up after
+ an error. */
+ free_subfiles_list ();
}
/* Subroutine of end_symtab to simplify it. Look for a subfile that
static void
watch_main_source_file_lossage (void)
{
- struct subfile *mainsub, *subfile;
+ struct subfile *subfile;
- /* Find the main source file.
- This loop could be eliminated if start_symtab saved it for us. */
- mainsub = NULL;
- for (subfile = subfiles; subfile; subfile = subfile->next)
- {
- /* The main subfile is guaranteed to be the last one. */
- if (subfile->next == NULL)
- mainsub = subfile;
- }
+ /* We have to watch for mainsub == NULL here. It's a quirk of
+ end_symtab, it can return NULL so there may not be a main subfile. */
+ if (main_subfile == NULL)
+ return;
/* If the main source file doesn't have any line number or symbol
- info, look for an alias in another subfile.
-
- We have to watch for mainsub == NULL here. It's a quirk of
- end_symtab, it can return NULL so there may not be a main
- subfile. */
+ info, look for an alias in another subfile. */
- if (mainsub
- && mainsub->line_vector == NULL
- && mainsub->symtab == NULL)
+ if (main_subfile->line_vector == NULL
+ && main_subfile->symtab == NULL)
{
- const char *mainbase = lbasename (mainsub->name);
+ const char *mainbase = lbasename (main_subfile->name);
int nr_matches = 0;
struct subfile *prevsub;
struct subfile *mainsub_alias = NULL;
if (nr_matches == 1)
{
- gdb_assert (mainsub_alias != NULL && mainsub_alias != mainsub);
+ gdb_assert (mainsub_alias != NULL && mainsub_alias != main_subfile);
/* Found a match for the main source file.
Copy its line_vector and symtab to the main subfile
and then discard it. */
- mainsub->line_vector = mainsub_alias->line_vector;
- mainsub->line_vector_length = mainsub_alias->line_vector_length;
- mainsub->symtab = mainsub_alias->symtab;
+ main_subfile->line_vector = mainsub_alias->line_vector;
+ main_subfile->line_vector_length = mainsub_alias->line_vector_length;
+ main_subfile->symtab = mainsub_alias->symtab;
if (prev_mainsub_alias == NULL)
subfiles = mainsub_alias->next;
static void
reset_symtab_globals (void)
{
- last_source_file = NULL;
- current_subfile = NULL;
+ set_last_source_file (NULL);
+ free_subfiles_list ();
pending_macros = NULL;
if (pending_addrmap)
{
}
}
-/* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
- as value returned by end_symtab_get_static_block.
+/* Subroutine of end_symtab_from_static_block to simplify it.
+ Handle the "no blockvector" case.
+ When this happens there is nothing to record, so just free up
+ any memory we allocated while reading debug info. */
- SECTION is the same as for end_symtab: the section number
- (in objfile->section_offsets) of the blockvector and linetable.
+static void
+end_symtab_without_blockvector (struct objfile *objfile)
+{
+ struct subfile *subfile;
- If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
- expandable. */
+ /* Since we are ignoring these subfiles, we also need
+ to unlink the associated empty symtab that we created.
+ Otherwise, we can run into trouble because various parts
+ such as the block-vector are uninitialized whereas
+ the rest of the code assumes that they are.
-struct symtab *
-end_symtab_from_static_block (struct block *static_block,
- struct objfile *objfile, int section,
- int expandable)
+ We can only unlink the symtab. We can't free it because
+ it was allocated on the objfile obstack. */
+
+ for (subfile = subfiles; subfile != NULL; subfile = subfile->next)
+ {
+ if (subfile->symtab)
+ {
+ struct symtab *s;
+
+ if (objfile->symtabs == subfile->symtab)
+ objfile->symtabs = objfile->symtabs->next;
+ else
+ ALL_OBJFILE_SYMTABS (objfile, s)
+ if (s->next == subfile->symtab)
+ {
+ s->next = s->next->next;
+ break;
+ }
+ subfile->symtab = NULL;
+ }
+ }
+}
+
+/* Subroutine of end_symtab_from_static_block to simplify it.
+ Handle the "have blockvector" case.
+ See end_symtab_from_static_block for a description of the arguments. */
+
+static struct symtab *
+end_symtab_with_blockvector (struct block *static_block,
+ struct objfile *objfile, int section,
+ int expandable)
{
- struct symtab *symtab = NULL;
+ struct symtab *symtab;
struct blockvector *blockvector;
struct subfile *subfile;
- struct subfile *nextsub;
+ CORE_ADDR end_addr;
- if (static_block == NULL)
- {
- /* Ignore symtabs that have no functions with real debugging info. */
- blockvector = NULL;
- }
- else
- {
- CORE_ADDR end_addr = BLOCK_END (static_block);
-
- /* Define after STATIC_BLOCK also GLOBAL_BLOCK, and build the
- blockvector. */
- finish_block_internal (NULL, &global_symbols, NULL,
- last_source_start_addr, end_addr, objfile,
- 1, expandable);
- blockvector = make_blockvector (objfile);
- }
+ gdb_assert (static_block != NULL);
+ gdb_assert (subfiles != NULL);
- /* Read the line table if it has to be read separately. */
+ end_addr = BLOCK_END (static_block);
+
+ /* Create the GLOBAL_BLOCK and build the blockvector. */
+ finish_block_internal (NULL, &global_symbols, NULL,
+ last_source_start_addr, end_addr, objfile,
+ 1, expandable);
+ blockvector = make_blockvector (objfile);
+
+ /* Read the line table if it has to be read separately.
+ This is only used by xcoffread.c. */
if (objfile->sf->sym_read_linetable != NULL)
- objfile->sf->sym_read_linetable ();
+ objfile->sf->sym_read_linetable (objfile);
/* Handle the case where the debug info specifies a different path
for the main source file. It can cause us to lose track of its
watch_main_source_file_lossage ();
/* Now create the symtab objects proper, one for each subfile. */
- /* (The main file is the last one on the chain.) */
- for (subfile = subfiles; subfile; subfile = nextsub)
+ for (subfile = subfiles; subfile != NULL; subfile = subfile->next)
{
int linetablesize = 0;
- symtab = NULL;
- /* If we have blocks of symbols, make a symtab. Otherwise, just
- ignore this file and any line number info in it. */
- if (blockvector)
+ if (subfile->line_vector)
{
- if (subfile->line_vector)
- {
- linetablesize = sizeof (struct linetable) +
- subfile->line_vector->nitems * sizeof (struct linetable_entry);
-
- /* Like the pending blocks, the line table may be
- scrambled in reordered executables. Sort it if
- OBJF_REORDERED is true. */
- if (objfile->flags & OBJF_REORDERED)
- qsort (subfile->line_vector->item,
- subfile->line_vector->nitems,
- sizeof (struct linetable_entry), compare_line_numbers);
- }
-
- /* Now, allocate a symbol table. */
- if (subfile->symtab == NULL)
- symtab = allocate_symtab (subfile->name, objfile);
- else
- symtab = subfile->symtab;
-
- /* Fill in its components. */
- symtab->blockvector = blockvector;
- symtab->macro_table = pending_macros;
- if (subfile->line_vector)
- {
- /* Reallocate the line table on the symbol obstack. */
- symtab->linetable = (struct linetable *)
- obstack_alloc (&objfile->objfile_obstack, linetablesize);
- memcpy (symtab->linetable, subfile->line_vector, linetablesize);
- }
- else
- {
- symtab->linetable = NULL;
- }
- symtab->block_line_section = section;
- if (subfile->dirname)
- {
- /* Reallocate the dirname on the symbol obstack. */
- symtab->dirname = (char *)
- obstack_alloc (&objfile->objfile_obstack,
- strlen (subfile->dirname) + 1);
- strcpy (symtab->dirname, subfile->dirname);
- }
- else
- {
- symtab->dirname = NULL;
- }
-
- /* Use whatever language we have been using for this
- subfile, not the one that was deduced in allocate_symtab
- from the filename. We already did our own deducing when
- we created the subfile, and we may have altered our
- opinion of what language it is from things we found in
- the symbols. */
- symtab->language = subfile->language;
-
- /* Save the debug format string (if any) in the symtab. */
- symtab->debugformat = subfile->debugformat;
-
- /* Similarly for the producer. */
- symtab->producer = subfile->producer;
+ linetablesize = sizeof (struct linetable) +
+ subfile->line_vector->nitems * sizeof (struct linetable_entry);
+
+ /* Like the pending blocks, the line table may be
+ scrambled in reordered executables. Sort it if
+ OBJF_REORDERED is true. */
+ if (objfile->flags & OBJF_REORDERED)
+ qsort (subfile->line_vector->item,
+ subfile->line_vector->nitems,
+ sizeof (struct linetable_entry), compare_line_numbers);
+ }
- /* All symtabs for the main file and the subfiles share a
- blockvector, so we need to clear primary for everything
- but the main file. */
+ /* Allocate a symbol table if necessary. */
+ if (subfile->symtab == NULL)
+ subfile->symtab = allocate_symtab (subfile->name, objfile);
+ symtab = subfile->symtab;
- symtab->primary = 0;
+ /* Fill in its components. */
+ symtab->blockvector = blockvector;
+ symtab->macro_table = pending_macros;
+ if (subfile->line_vector)
+ {
+ /* Reallocate the line table on the symbol obstack. */
+ symtab->linetable = (struct linetable *)
+ obstack_alloc (&objfile->objfile_obstack, linetablesize);
+ memcpy (symtab->linetable, subfile->line_vector, linetablesize);
}
else
- {
- if (subfile->symtab)
- {
- /* Since we are ignoring that subfile, we also need
- to unlink the associated empty symtab that we created.
- Otherwise, we can run into trouble because various parts
- such as the block-vector are uninitialized whereas
- the rest of the code assumes that they are.
-
- We can only unlink the symtab because it was allocated
- on the objfile obstack. */
- struct symtab *s;
-
- if (objfile->symtabs == subfile->symtab)
- objfile->symtabs = objfile->symtabs->next;
- else
- ALL_OBJFILE_SYMTABS (objfile, s)
- if (s->next == subfile->symtab)
- {
- s->next = s->next->next;
- break;
- }
- subfile->symtab = NULL;
- }
- }
- if (subfile->name != NULL)
{
- xfree ((void *) subfile->name);
+ symtab->linetable = NULL;
}
- if (subfile->dirname != NULL)
+ symtab->block_line_section = section;
+ if (subfile->dirname)
{
- xfree ((void *) subfile->dirname);
+ /* Reallocate the dirname on the symbol obstack. */
+ symtab->dirname =
+ obstack_copy0 (&objfile->objfile_obstack,
+ subfile->dirname,
+ strlen (subfile->dirname));
}
- if (subfile->line_vector != NULL)
+ else
{
- xfree ((void *) subfile->line_vector);
+ symtab->dirname = NULL;
}
- nextsub = subfile->next;
- xfree ((void *) subfile);
- }
+ /* Use whatever language we have been using for this
+ subfile, not the one that was deduced in allocate_symtab
+ from the filename. We already did our own deducing when
+ we created the subfile, and we may have altered our
+ opinion of what language it is from things we found in
+ the symbols. */
+ symtab->language = subfile->language;
- /* Set this for the main source file. */
- if (symtab)
- {
- symtab->primary = 1;
+ /* Save the debug format string (if any) in the symtab. */
+ symtab->debugformat = subfile->debugformat;
- if (symtab->blockvector)
- {
- struct block *b = BLOCKVECTOR_BLOCK (symtab->blockvector,
- GLOBAL_BLOCK);
+ /* Similarly for the producer. */
+ symtab->producer = subfile->producer;
- set_block_symtab (b, symtab);
- }
+ /* All symtabs for the main file and the subfiles share a
+ blockvector, so we need to clear primary for everything
+ but the main file. */
+ set_symtab_primary (symtab, 0);
}
- /* Default any symbols without a specified symtab to the primary
- symtab. */
- if (blockvector)
- {
- int block_i;
+ /* The main source file is the primary symtab. */
+ gdb_assert (main_subfile->symtab != NULL);
+ symtab = main_subfile->symtab;
+ set_symtab_primary (symtab, 1);
+ {
+ struct block *b = BLOCKVECTOR_BLOCK (symtab->blockvector, GLOBAL_BLOCK);
- for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++)
- {
- struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i);
- struct symbol *sym;
- struct dict_iterator iter;
+ set_block_symtab (b, symtab);
+ }
- /* Inlined functions may have symbols not in the global or
- static symbol lists. */
- if (BLOCK_FUNCTION (block) != NULL)
- if (SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) == NULL)
- SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) = symtab;
+ /* Default any symbols without a specified symtab to the primary symtab. */
+ {
+ int block_i;
+
+ for (block_i = 0; block_i < BLOCKVECTOR_NBLOCKS (blockvector); block_i++)
+ {
+ struct block *block = BLOCKVECTOR_BLOCK (blockvector, block_i);
+ struct symbol *sym;
+ struct dict_iterator iter;
+
+ /* Inlined functions may have symbols not in the global or
+ static symbol lists. */
+ if (BLOCK_FUNCTION (block) != NULL)
+ if (SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) == NULL)
+ SYMBOL_SYMTAB (BLOCK_FUNCTION (block)) = symtab;
+
+ /* Note that we only want to fix up symbols from the local
+ blocks, not blocks coming from included symtabs. That is why
+ we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
+ ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
+ if (SYMBOL_SYMTAB (sym) == NULL)
+ SYMBOL_SYMTAB (sym) = symtab;
+ }
+ }
- /* Note that we only want to fix up symbols from the local
- blocks, not blocks coming from included symtabs. That is why
- we use ALL_DICT_SYMBOLS here and not ALL_BLOCK_SYMBOLS. */
- ALL_DICT_SYMBOLS (BLOCK_DICT (block), iter, sym)
- if (SYMBOL_SYMTAB (sym) == NULL)
- SYMBOL_SYMTAB (sym) = symtab;
- }
+ return symtab;
+}
+
+/* Implementation of the second part of end_symtab. Pass STATIC_BLOCK
+ as value returned by end_symtab_get_static_block.
+
+ SECTION is the same as for end_symtab: the section number
+ (in objfile->section_offsets) of the blockvector and linetable.
+
+ If EXPANDABLE is non-zero the GLOBAL_BLOCK dictionary is made
+ expandable. */
+
+struct symtab *
+end_symtab_from_static_block (struct block *static_block,
+ struct objfile *objfile, int section,
+ int expandable)
+{
+ struct symtab *s;
+
+ if (static_block == NULL)
+ {
+ end_symtab_without_blockvector (objfile);
+ s = NULL;
+ }
+ else
+ {
+ s = end_symtab_with_blockvector (static_block, objfile, section,
+ expandable);
}
reset_symtab_globals ();
- return symtab;
+ return s;
}
/* Finish the symbol definitions for one main source file, close off
void
augment_type_symtab (struct objfile *objfile, struct symtab *primary_symtab)
{
- struct blockvector *blockvector = primary_symtab->blockvector;
- int i;
+ const struct blockvector *blockvector = primary_symtab->blockvector;
if (context_stack_depth > 0)
{
free_pendings = (*srclist);
}
\f
+
+/* Name of source file whose symbol data we are now processing. This
+ comes from a symbol of type N_SO for stabs. For Dwarf it comes
+ from the DW_AT_name attribute of a DW_TAG_compile_unit DIE. */
+
+static char *last_source_file;
+
+/* See buildsym.h. */
+
+void
+set_last_source_file (const char *name)
+{
+ xfree (last_source_file);
+ last_source_file = name == NULL ? NULL : xstrdup (name);
+}
+
+/* See buildsym.h. */
+
+const char *
+get_last_source_file (void)
+{
+ return last_source_file;
+}
+
+\f
+
/* Initialize anything that needs initializing when starting to read a
fresh piece of a symbol file, e.g. reading in the stuff
corresponding to a psymtab. */
pending_blocks = NULL;
pending_macros = NULL;
using_directives = NULL;
+ subfile_stack = NULL;
/* We shouldn't have any address map at this point. */
gdb_assert (! pending_addrmap);
projects / deliverable / binutils-gdb.git / blobdiff